<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
</head>
<style>
    .grid-container {
        display: grid;
        grid-template-columns: auto auto auto;
        grid-gap: 10px;
        background-color: #2196F3;
        padding: 10px;
    }

    .grid-container>div {
        background-color: rgba(255, 255, 255, 0.8);
        text-align: center;
        padding: 20px 0;
        font-size: 30px;
    }

    .item1 {
        grid-column-start: 1;
        grid-column-end: 4;
    }

    .item2 {
        grid-row-start: 2;
        grid-row-end: 4;
    }

    .item8 {
        grid-column-start: 2;
        grid-column-end: 4;
    }
</style>
</head>

<body>
<!--   一个简单的常见grid布局样式 -->
    <h1>网格线</h1>

    <div class="grid-container">
        <div class="item1">1</div>
        <div class="item2">2</div>
        <div class="item3">3</div>
        <div class="item4">4</div>
        <div class="item5">5</div>
        <div class="item6">6</div>
        <div class="item7">7</div>
        <div class="item8">8</div>
    </div>

    <p>网格元素设置时可以参考行号。</p>

</body>

</html>